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Everything posted by kevin gilmore
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Megatron Electrostatic Headphone Amplifier
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
trivial and almost instantaneous buy some tubes, and use these http://www.ebay.com/itm/1PC-EL156-TO-KT88-10Pin-to-8Pin-Vacuum-Tube-Convert-Socket-Adapter-/221235762073?pt=Vintage_Electronics_R2&hash=item3382add399 requires slight rewiring to add g3. as for the 13e1, those are brutally priced -
birgir could always use cavalli. Tie him to the hood like a dear. But first he would have to do a Hansel and Gretel on him. The guy is pathetically thin.
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he needs extra dead weight in the trunk for winter
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Megatron Electrostatic Headphone Amplifier
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
one chicken on each of the 4 x 6c33's -
Megatron Electrostatic Headphone Amplifier
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
This will warm you right up. So will the thing blubliss just finished up. he should post a few pictures. He could cook 4 complete chickens on that thing. -
looks real to me
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The Ultimate DIY Part 2 ? The KGITSOJC
kevin gilmore replied to kevin gilmore's topic in Do It Yourself
well there is this http://gilmore.chem.northwestern.edu/sqss1.jpg I'm not going to finish the ultimate preamp till a reliable source of audio grade complementary jfets is available. Too many fakes out there to design with old stuff, and linear systems is a bunch of incompetent fucknuts. But I do have a working one on the bench. It has to be a jfet input otherwise the input impedance is too low and the bipolar parts have too much offset with high impedance sources. -
KnobFeel - reviews based purely on the feel of the knob
kevin gilmore replied to Grahame's topic in Off Topic
i think only one of those were ever built -
Using 2 Epsilon 27 boards for ALPS quad pot
kevin gilmore replied to sbelyo's topic in Do It Yourself
not sure what software you are using, but this board file is the same as every other one I have done. may not be compatible with some panelizing software, but have produced thousands of boards with the software I use. -
Using 2 Epsilon 27 boards for ALPS quad pot
kevin gilmore replied to sbelyo's topic in Do It Yourself
http://gilmore.chem.northwestern.edu/rk27quad.zip -
Using 2 Epsilon 27 boards for ALPS quad pot
kevin gilmore replied to sbelyo's topic in Do It Yourself
like this http://gilmore.chem.northwestern.edu/rk27quad.jpg -
Using 2 Epsilon 27 boards for ALPS quad pot
kevin gilmore replied to sbelyo's topic in Do It Yourself
is each section 10mm from the next, and hole size or a pdf of the quad pot -
Using 2 Epsilon 27 boards for ALPS quad pot
kevin gilmore replied to sbelyo's topic in Do It Yourself
does not work with some sources. ends up with a dc offset, or causes issues like eddie current has with the electra -
Using 2 Epsilon 27 boards for ALPS quad pot
kevin gilmore replied to sbelyo's topic in Do It Yourself
i can whip up a board if you want to have some made. birgir has boards for the alpha pots -
if you can unsolder the power supply electrolytics from those 5 or more layer computer boards, and the caps still have 2 wires sticking out of them, then you are ready to work on stax.
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The connectors on this RAL cable are anything but audiophile grade. The cheapest of the cheap, plastic insides. I did fix the cable but the thin silver has a resistance of .250 ohms on each wire, double that of the original cable. amphenol part numbers L77DE09S L717DE09P printed right on the shell. http://gilmore.chem.northwestern.edu/dsc_0514.jpg this is what they should be using which has machined pins and high temp polyester instead of the super cheapass thermoplastic http://www.newark.com/itt-cannon/demm9p/connector-d-sub-plug-9pos/dp/37P0488?in_merch=Popular%20D-Subminiatures and none of this .925 stuff. we need the real thing http://gilmore.chem.northwestern.edu/silverbar.jpg this is the powder http://www.shop3m.com/3m-ceramic-microspheres-white-grade-w-610-1-gal-sample.html
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the original krell db9 cable is wired with stranded 22 gauge spc wire. one wire for each power supply and 3 for ground. correctly soldered and heatshrink on the pins. the morons wired all 9 pins with 24 gauge wire. with something higher in resistance. and at 400ma that makes a defference! monsterslayer sells pure silver wire at rational prices. even 9 wires 22 gauge total length of 18 feet is less than $30. so maybe $75 to make a better cable plus an hour of labor. my guess is that tom is going to get a replacement stax mafia cable that performs correctly and is way better built. minus the magic pixie dust. real cryo treatment a no cost option. 77K. now if tom wants 4.2K that is going to be expensive.
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I used lemo's... But I have a whole box of them from scrapping very expensive and old mass-specs. And all the new ones still use the same parts, so I will have a supply of lemo's for a long time.
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I will take a picture later Revelation Audio Labs 'Passage' CryoSilver Reference Umbilical Power Cable Handcrafted in Palm Coast, FL, USA
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yes those fucking incompetent morons. After over 30 minutes of attacking it with an xacto knife, this http://gilmore.chem.northwestern.edu/dsc_0510.jpg gardenhose and glue here are 2 more. http://gilmore.chem.northwestern.edu/dsc_0511.jpg http://gilmore.chem.northwestern.edu/dsc_0512.jpg 2 of the wires are not even fully soldered. and does anyone really think this is 99.999% pure silver. there is no such thing. This is a $700 cable... but wait, there is even more http://gilmore.chem.northwestern.edu/dsc_0513.jpg there is white shit leaking out of the hose inside the connector. Its talcum powder or some such crap. probably why they tried to fill the ends of the gardenhose with industrial strength glue, which since it does not bend with the cable (like rtv would) ends up cracking and leaking out the powder. WHAT THE FUCK... they really must have hired Patrick to make this crap. speaking of which, his latest website is quite funny.
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andy built a diyT2 as his first electronics project ever. (although he seems to have divine help on this stuff) Getting the old caps out is not as easy as you might think, the circuit boards are crap and if you don't already know how to solder, best to have someone else do it and watch. And yes the voltages in the thing (+ and - 350V) and the energy stored in those caps is not something to take lightly.
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I actually figured out what the morons did to the cable, and what transistor popped because of their stupidity before the thing actually showed up. So other than taking it apart, the repair was easy. And while I was at it, 4 of the blackgate caps in the power supply were replaced with 35v versions instead of the 25v versions running at 34V which Mikhail stuffed in there. Pictures later as I take the cable apart. I get to listen this weekend to the real thing vs the klone. Its a rough job, but someone has to do it
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WARNING to any one that would even think of buying a Revelation Audio Labs power supply to amplifier cable for a real krell ksa5. These fucking morons can't even wire a simple cable and get the pins in the right order. Tom found this out when his ksa5 blew up. So its sitting on my lab bench, and about 3 hours of repair time to repair the damage. And tom was very lucky, it could have been worse. Ended up with -21 on the +21 line and vice versa. Without the protection diodes, very bad things would have happened. Waiting for tom to give me permission to rip the cable apart and see how bad the assembly job is. Shades of coconut audio with blobs of modeling clay.
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Need Help with Audio Note Headphone Amp
kevin gilmore replied to audiosceptic's topic in Do It Yourself
yep mine is a paperweight too, sits on my desk. But as it was completely fucked over by hennyo dripping solder into the insides of the thing, i took it apart to fix it. I did fix it. But i will never use it because it will not stay fixed. Great idea, poor execution. -
Need Help with Audio Note Headphone Amp
kevin gilmore replied to audiosceptic's topic in Do It Yourself
those resistors on the khozmo are supposed to be there. they are also supposed to be caddok resistors, not what is shown. they are the shunt resistors to ground and control the output impedance of the pot. a lower impedance pot is always better for noise. As long as your source can drive it.